import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int b = in.nextInt();
        char k = (char)('0'+b);
        if(b == 0){
            System.out.println(0);
            return;
        } 
        StringBuffer s = new StringBuffer(n + "");
        int count = 0;
        for(int i = 0;i<s.length();i++){
            if(s.charAt(i) == '1'){
                count++;
                s.deleteCharAt(i);
                i--;
            }
        }
        while(count > 0){
            count--;
            s.append('1');
        }
        System.out.println(s);
        return;
    }
}